Hello!
It seems that prompt and continue argument of options() must be at least
of length one i.e.
> options(prompt="")
Error in options(...) : prompt parameter invalid
> options(prompt=" ")
# bla, bla, ...
> options(prompt="> ")
> # bla, bla, ...
> options(continue="")
Error in options(...) : invalid continue parameter
> options(continue=" ")
> ls(
)
This could be properly documented as shown bellow. I do not think that
it is worth bothering with modifying the code to allow empty prompt and
continue argument.
Cheers!
Index: R/src/library/base/man/options.Rd
===================================================================
--- options.Rd (revision 38890)
+++ options.Rd (working copy)
@@ -58,7 +58,7 @@
like \code{x <- 1:3; x[5] <- 6}.}
\item{\code{continue}:}{a string setting the prompt used for lines
- which continue over one line.}
+ which continue over one line. Must be at least of length 1.}
\item{\code{defaultPackages}:}{the packages that are attached by
default when \R starts up. Initially set from value of the
@@ -179,7 +179,7 @@
argument.}
\item{\code{prompt}:}{a string, used for \R's prompt; should usually
- end in a blank (\code{" "}).}
+ end in a blank (\code{" "}). Must be at least of length 1.}
--
Lep pozdrav / With regards,
Gregor Gorjanc
----------------------------------------------------------------------
University of Ljubljana PhD student
Biotechnical Faculty
Zootechnical Department URI: http://www.bfro.uni-lj.si/MR/ggorjan
Groblje 3 mail: gregor.gorjanc <at> bfro.uni-lj.si
SI-1230 Domzale tel: +386 (0)1 72 17 861
Slovenia, Europe fax: +386 (0)1 72 17 888
----------------------------------------------------------------------
"One must learn by doing the thing; for though you think you know it,
you have no certainty until you try." Sophocles ~ 450 B.C.
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